Paste-tube.



F. J. HOLLIS. PASTE TUBE.

APPLICATION FILED JULY 11,1918.

Patented Sept. 24, 1918.

amen 01 ding? FRANK J. HOLLIS, or CANANDAIGUA, NEW YORK.

PASTE-TUBE.

Specification of Letters Patent.

Patented Sept. 24, 1918.

Application filed July 11, 1918. Serial No. 244,444.

To all whom it may concern:

Be it known that I, FRANK J. HOLLIS, a citizen of the United States, residing at Canandaigua, in the county of Ontario and State of New York, havev invented certain new and useful Improvements in Paste- Tubes, of which the following is a specification.

This invention relates to improvements in collapsible tubes for containing paste material such as dental creams, face creams, salves and the like, and more particularly to an improvement in the construction of the discharge spout and closure cap of such a tube.- Ordinarily the discharge spout ofa paste tubeof this general class is exterior-1y cylindrical and continuously threaded from its outer to its inner end, and the closure cap for the spout is likewise interiorly cylindrical and continuously threaded. This con struction, however, presents several disadvantages. In the first place more or less time is required in completely unthreads ing the closure cap or fully threading the same on to the spout after vthe desired quantity of paste has been squeezed from the tube and as a result a careless person is liable in replacing the closure cap to give the same only one or two turns thus incompletely sealing the tube and permitting evaporation and consequent hardening of its contents; or the cap is so insecurelythreaded I on to the spout that it is liable, in coming in contact with other articles, to be lost. Furthermore, the spouts and closure caps of is in place it will be as securely and eflecarticles of thisclass are made of extremely soft metal and the threads are therefore easily mutilated so that if the cap is frequently removed and replaced the threads. are liable to become so worn that the cap will inseourely seal the spout, thus permitting evaporation as above stated. In consideration of the advantages presented in the use of theordinary type of spout and cap above briefly described, the present invention aims to provide a spout and ca so constructed that the cap may be remove from the spout by merely giving the cap a part of a turn,

. and likewise it may be replaced in this convenient and quick manner.

While the resent invention contemplates that the cap 51211 be readily and quickly removable and replaceable through only a partial rotation thereof as stated above, the invention further has as its object to so con Struct the spout and cap that when the cap tually locked and the spout closed in an airtight manner, as though it were of the ordinary construction above pointed out, so that while the article of the present invention retains all of the advantages possessed by the old spout and closure, it possesses also the new advantages above mentioned.

In the accompanying drawings:

Figure 1 is a perspective view of the upper portion of a paste tube, the view illustrating the spout and closure cap embodying the invention, and the said cap being illustrated as removed from the spout;

Fig. 2 is a vertical transverse sectional View through the spoutand closure, the closure being in place upon the spout;

Fig.3 is a similar view taken on the line 33 of Fig. 2 and illustrating the cap in full lines in closed position and in dotted lines removed from the spout and rotated through an arc of 90.

In the drawings the numeral 1 indicates in general the paste tube which in itself is of the ordinary collapsible sheet metal type, the numeral 2 indicates in general the discharge spout through which the paste con- I tents of the tube'are caused to issue when the tube is squeezed, and the numeral '3 indicates in general the ClOSIfiQ cap for the spout 2.

The spout 2 is united at its inner end in any of the usual manners to the upper end of the tube 1 and the said spout has generally the form'of a cylinder, opposite sides a of which have been removed to parallel y plane's. Thus the spout has parallel flat side walls 4 and between these walls has walls 5 each ofwhich describes a portion- The walls 5 are exteriorly of a cylinder. threaded as indicated by the numeral 6, so as to adapt the closure cap to be fitted and locked on to the spout in a manner to be presently pointed out. Centrally the spout 2 is formed with an orifice 7 defined or bounded by the inner faces of the walls 4 and 5 of the spout. Thus the orifice 7 is of such shape that the paste will be discharged from the outer end thereof in a ribbon-like stream which, as is well-known, presents advantages, As has been pointed out above the spouts and caps of articles of this class are ordinarily made of soft metal and in order to prevent collapse of the walls4, which walls are, of course, relatively thin, it is preferable that the walls 4 and 5 at their through contact with other objects, and, of

course, if this occurred the flow of paste would be interfered with until the spout had been restored to its original shape.

The cap 3 comprises a hollow cylindrical body the wall of which is indicated by the numeral 9 and the said wall, for convenience in removing and replacing the cap, is pref- .erably milled or roughened exteriorly as indicated by the numeral 10. Interiorly the wall 9 is formed with threads 11 vwhich, however, are interrupted .at diametrically opposite points. In interrupting the threads at diametrically opposite points and along lines extending parallel to each 'other and to the axis of the cap, grooves 12 are formed and these grooves are of a width or angular extent corresponding substantially to the lesser diameter of the spout 4. or, in other words, to the angular extent of the threaded walls 5 of the said spout, the threads 11 extending continuously. however, between the said-grooves 12, as clearly shown in Fig. 1 of the drawings. Alsothe threads 6 and 11 extend respectively from the inner to the outer end of the spout 2 and the inner or outer end of the closure cap 3.

When the closure cap 3 is in place upon the spout the threads 11 will, of course, fit the threads 6, the walls 5 of the spout 2 being at such time located at some point intermediate of the grooves 12. In order to remove the cap 3 it is only necessary, as will be readily understood, to rotate the cap through a part of a turn or, in other words, until the threads 6 upon the walls 5 of the spout occupy or lie within the grooves 12 within the wall of the cap whereupon the cap may be lifted directly from the spout. Also in replacing the cap it is only necessary to so position the same that the threaded walls 5 of the spout will be in registration with the grooves 12 whereupon the cap may he slipped on to the spout and then given a part turn in order to cause the threads 11 to engage the threads 6 whereupon the cap will be securely locked upon the spout and the open end or mouth of the spout will be effectually closed. It will be understood from the foregoing that inasmuch as it is only necessary to turn the cap a part of one revolution in order to remove or replace the same, the threads are sub jected to a minimum amount of wear through mutual contact and are, therefore, not near so liable to become mutilated or worn away V as in the old construction Where it was necessary to rotate the cap through a number of revolutions in order to remove or replace it.

It will be understood, of course, that instead of an opening 7 of the form shown in the drawings and herein described, the spout may be provided with an opening of any other desired shape and dimensions, sacrificing,- of course, any advantages which might flow from the use of an opening of the shape shown in the drawings.

Having thus described the invention, what is claimed as new is:

1. In combination, a spout having 0 pcsitely located plain walls and interme iate exteriorly threaded walls, and a closure cap for the spout interiorly threaded and having its threads interrupted at opposite sides V of its wall to provide grooves to receive the threaded intermediate walls of the spout in removing and replacing the cap. 2. In combination, a spout having oppositely located plain walls and intermediate exteriorly threaded walls, and a closure cap for the spoutinteriorly threaded and having its threads interrupted at opposite sides of its wall to provide grooves to receive the threaded intermediate walls of the spout in removing and replacing the cap, the spout having a central longitudinal orifice, and the walls of the spout at the discharge endthereof being provided with reinforcing flanges pro3ecting inwardly. v

In testimony whereof I affix my signature.

FRANK J; HOLLIS. [1,. 3. 

